Chrome Extension · Early Access

Your AI session
never has to end

Thread keeps your Claude and ChatGPT sessions alive forever — rolling checkpoints, invisible continuity, and a seamless handoff that feels like the conversation never stopped.

Get early access See how it works
The problem

Claude forgets.
So does ChatGPT.

Every AI chat has a context window — a limit to how much it can hold. When you hit it, you start over. Your decisions, your code, your context: gone.

🧠
Context rot sets in early
Long before you hit the limit, response quality degrades. The AI can't accurately recall what you decided three hours ago.
📋
The clipboard ritual
Copy the summary. Open new chat. Paste. Wait. Re-explain. Lose half the context anyway. Repeat every 90 minutes.
🕳️
Early context disappears
That critical architectural decision you made in message 4? By message 80, the AI has no idea it happened.
⏱️
Re-onboarding tax
Every new session costs 5–15 minutes of context-rebuilding before you get back to real work.
How it works

Three layers.
One seamless session.

Thread runs silently alongside your AI session. You never change how you work — Thread handles the continuity automatically.

📸
Layer 1 · Always on
Rolling checkpoints capture everything
Every 15 messages, Thread silently calls the Claude API in the background and saves a structured snapshot of your session state — decisions made, code written, context established. Each checkpoint is timestamped and stored. You never see it happen.
🔀
Layer 2 · On Extend
All checkpoints merge into one perfect state
When you click Extend, Thread captures one final checkpoint and then merges all of them using a proprietary merge prompt. Later checkpoints override earlier ones on the same decision. Early foundational context is preserved. The result is a complete, accurate picture of your entire session — even from messages the AI has long forgotten.
✨
Layer 3 · Thread Chat
A new session opens, already up to speed
Thread opens its own chat interface. The full session state loads invisibly. The AI's first response references something specific from your actual work — as if no time passed. You just keep going.
What you get

Built for people who
do serious work with AI.

🔇
Completely invisible
No prompts appear in your chat. No clipboard. No manual steps. Thread works entirely in the background via direct API calls.
🧩
Works with Claude and ChatGPT
Thread monitors both. When you extend, Thread Chat continues in whichever model you were using — or switch mid-session if you want.
🗓️
Time and place aware
Every session includes current date, time, and your location. Your AI always knows when and where it is — without you mentioning it.
💾
Session persistence
Close Thread Chat and come back later. Your full conversation history is saved and can be restored with one click — exactly where you left off.
⧉
Detachable monitor
Detach the Thread panel into a floating window. Watch checkpoint captures, context fill, and session signals live — while you keep working.
🔑
Your keys, your data
Thread uses your own Anthropic and OpenAI API keys. Your conversation data never touches Thread's servers. Everything stays in your browser.
What Thread does well
  • Eliminates the context window problem for long working sessions
  • Captures early-session decisions that Claude forgets by message 50
  • Zero friction — works invisibly, no workflow changes needed
  • Model-agnostic — works the same on Claude and ChatGPT
  • Your keys, your data — nothing stored on external servers
  • Checkpoint quality improves as your session grows richer
Honest limitations
  • Requires your own Anthropic or OpenAI API key — not free to run
  • Checkpoint captures use API tokens — cost depends on session length
  • Thread Chat is a new interface, not the native Claude or ChatGPT UI
  • Currently Chrome only — Firefox and Safari not yet supported
  • Early access software — rough edges exist, feedback welcome
  • Context estimation is approximate, not a precise token count
3×
Longer effective sessions
0
Manual steps to extend
v3.3
Current release
2
AI platforms supported
Session continued
🧵
Still on the detach window fix — the storage flag approach should nail the async race condition we kept hitting.
›
Good. Let's ship it and move to the marketing site.
🧵
On it. One HTML file, Netlify form, dark and distinctive. Give me a few minutes.
Continue the conversation…

Get early access.
Shape what's next.

Thread is in active development. Founding members get in first, pay less forever, and have a direct line to the team.

$10
one-time · founding member access
locks in your discounted monthly rate for life
Become a founding member →

100 founding member spots. Early access when Thread launches.